It may interest ham radio enthusiasts, hardware hackers, tinkerers and anyone interested in RF.

If you are unfamiliar with ham radio, a ham repeater is simply a radio station that receives voice or other signals on a certain ham radio frequency, and re-transmits the signal with stronger power on another frequency.

This allows communications to be receivable over a much larger distance.

In the video Tech Minds shows the HackRF being used as a transmitter, with it transmitting to a repeater at 145.137 MHz.

An RTL-SDR is then used to listen to the repeater output at 145.737 MHz.

With this set up he is able to contact a friend via the repeater easily.

If I were doing this experiment, I would construct a band-pass filter to ensure that any harmonics or other spurious signals are reasonably controlled.

The video made no mention of any filter or prior testing with a spectrum analyzer.

Thats your problem.

I care if the transmitter puts garbage on the air.

I suspect that there is a great deal more coming out of that HackRF One transmitter connector than just the desired signal and it is probably not even in-band.

It is incumbent upon any amateur licensee to determine that the transmitter was either designed and certified to a specific standard, or that it has been tested and known to meet that standard.

All it takes is one airliner having to execute missed approach procedures and the authorities will come looking for you.

It has happened before due to faulty outdoor amplified TV antennas.

This applies regardless of whether you think youre radiating on an unlicensed frequency or are operating with a proper license.

If your into testing and experimenting in the in the RF then sure, use gnuradio or python and start designing some cool protocols and filters then ya grab a hackrf, but then again for the money I would move to something post circa 2014 lol.

Ive got a HackRF One coming in the mail, and yeah, Ill look at the output with my spectrum analyzer before I connect it to an antenna.

But I do intend to do some experiments with ultra QRP transmitting.

I know that some folks have used HackRF with small amps and filters to do QRP experiments for fun.

I bought one (a cheap clone) for a specific receive only application, and it worked well.

But every time that I open the drawer that it now lives in, I hear it calling me to do more with it.

Feb 27, 05:23 Eric Gilman on Listening to Trunked Radios with One RTL-SDR: I wish the links in this article worked so I coud get me SDR to work for P25.

Feb 26, 21:29 ajego237632 on The BIG List of RTL-SDR Supported Software: Could you include licensing information about each of these software, i.e.

GPL, BSD etc.) Feb 25, 18:00 Jun on Using the SDRuno EXTIO Edition with an RTL-SDR and other SDRs: He does explain nothing but just show off his working setup.

Whats that nonsene Feb 25, 16:53 Michael McC on Osmo-FL2K: A TX-Only SDR Hacked From Commodity 5 USB to VGA Adapters Demos Available for Transmitting WBFM, GSM, UMTS, GPS: If you were frequency shifting, though youd need both I and Q on at least one of the channels to Feb 25, 05:45 Jason on SignalsEverywhere: Installing and Configuring OP25 Phase 1 2 Digital Voice Decoder on Linux: Thanks for the tutorial.

My assumption from the video is that a single SDR dongle is needed, can you confirm Feb 25, 04:56 Michael McC on Osmo-FL2K: A TX-Only SDR Hacked From Commodity 5 USB to VGA Adapters Demos Available for Transmitting WBFM, GSM, UMTS, GPS: Looks like the hack uses just the Red output.

Seems to me, just on an off-the-top-of-my-head impression, that the three Feb 25, 04:33 Tweets by rtlsdrblog Categories Categories.

Hackrf One Ham Radio